Ergonomic dental tools

ABSTRACT

A dental tool is disclosed that includes an operational unit, a neck region and a handle region, in which the neck region is S-shaped. The operational unit can further include a tongue retractor, a flap retractor or a combination thereof. A suction mechanism may be added for eliminating fluids. The neck region may further contain a lateral bend, a rotation of the working end or both. The proximal end of the handle region, opposite the operational unit, may further include any useful apparatus, such as a periosteal elevator or periosteal retractor.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.13/927,560, filed on Jun. 26, 2013, which is a continuation-in-part ofU.S. patent application Ser. No. 13/624,257, filed on Sep. 21, 2012,which is a continuation of U.S. patent application Ser. No. 12/405,751,filed on Mar. 17, 2009, the contents of all of which are incorporatedherein by reference in their entireties.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention generally relates to the fields of generaldentistry, oral surgery and periodontal surgery and to surgicalinstrumentation used therein. More specifically, the invention relatesto tongue and flap retractors, as well as suction tools, used in generaldental procedures, periodontal and oral surgery.

2. Description of the Related Art

Many dental procedures require the precise use of surgical instrumentswithin a small and restricted area of operation. Furthermore, it isusually desirable to selectively supply air or water to a treatmentarea, drill in a treatment area, or to manipulate soft tissue. To do so,Dentists have conventionally used various instruments to manipulatetissue, suction liquids or retract the tongue while performing thedesired procedure. By way of example, a primary method used to retracttongue involves using a standard dental mirror. However, the size of themirror and lack of proper physics and ergonomics makes this procedureneedlessly difficult.

Hence, conventional methods frequently present various problems. Forexample, because of the restricted area, it is undesirable and usuallyimpractical to crowd the oral cavity with multiple instruments. When twoor three different instruments are placed in a patient's oral cavity,the practitioner is unable to clearly see the area of operation.Furthermore, because of the tight quarters, the instruments becomelimited in their range of motion. Thus, the degree of difficulty isunnecessarily increased for even the simplest of procedures.

The use of multiple instruments is impractical as it severely limits theability of the general dentist, periodontal surgeon, oral surgeon orassistant (herein, “Dentist”) to properly perform the requiredprocedures. For instance if a Dentist uses one hand to retract thetongue and another to hold a surgical flap away from the treatment area,then he will need to ask for an assistant to reach for anotherinstrument, or the assistant must hold an instrument and retract eitherthe tongue or flap while he/she is simultaneously suctioning orperforming a different task. The only other option would be to performthe operation in segments or go back and forth between instruments untilthe procedure is complete. This unnecessary complexity lengthens thetime of operation, reduces the efficiency of the procedure and increasespatient discomfort.

Finally, a common problem in the field is that Dentists regularlycomplain of neck, back and shoulder pain, as well as pain related tocarpal tunnel syndrome. In fact, a comprehensive literature searchindicates dental care providers are at a high risk for sufferingworkplace musculoskeletal disorders (WMSD) and neuromuscular disorders,e.g. disc herniation. Studies have reported that Dentists who suffer aWMSD injury have a lost work day average of 93 days per incident. Infact, sixty-two percent of dental hygienists have complained of neckproblems and eighty-one percent have complained of shoulder pain in oneor both shoulders. Studies have also shown that between six and sevenpercent of all dental hygienists report being diagnosed with carpaltunnel syndrome and that fifty-nine percent of dentists have reportedmusculoskeletal pain. A survey of a U.S. Army dental clinic reportedthat over seventy-five percent of all dental workers complained of oneor more carpal tunnel syndrome symptoms, over fifty percent complainedof back and shoulder pain, and eleven percent were diagnosed as havingcarpal tunnel syndrome. These disorders and others can be addressed withproper emphasis on ergonomics and posture, and by shortening the lengthof the dental procedure.

Thus, missing from the art is an invention that allows greater control,while affording the Dentist an opportunity to practice with betterposture. Moreover, an invention that reduces the time of operation wouldhave several benefits for both patients and Dentists by: (i) reducingstrain on the neck, back, shoulders and hands of Dentists, (ii) reducingthe amount of discomfort experienced by patients during procedures inwhich they remain awake, and (iii) reducing the adverse risks to thepatient associated with the use of general anesthesia in situationswhere patients are anesthetized for a procedure.

SUMMARY OF THE INVENTION

One embodiment of the invention is directed to a combination tongue andsurgical flap retractor. The combination retractor may include anoperational unit, a neck region and a handle region. The operationalunit further includes a tongue retractor and a flap retractor. Thetongue retractor may be formed with a concave shape, a flat shape, orwith an increased overall thickness of the operational unit. The flapretractor may be formed with a tapered extended edge or tab, which canbe made in various lengths. Furthermore, the flap retractor may alsoinclude a beveled edge. The combination retractor may be formed in a waysuch that the tongue retractor is disposed on a different plane than theflap retractor. The retractor may also include a suction mechanism foreliminating fluids such as saliva, water, and blood from the oralcavity.

The present invention is also directed to improved ergonomics in theneck region of the operational unit. In one embodiment, the neck regioncontains an S-shaped design for better ergonomics. Furthermore, the neckregion may also include a lateral bend positioned at the proximal end ofthe operational unit, so as to position the operational unit either tothe right or the left with respect to the central axis of the handle.Also, a rotational offset may be incorporated in the working end inorder to further help to accommodate the tool to the anatomy of themandible and the position of the patient's mouth during a procedure.Therefore, this facilitates specific use on a respective side of themouth based on the direction of the lateral bend.

Finally, the present invention is directed to improvements in the handleregion of the combination retractor. In one embodiment, the handleregion includes a grip portion having various widths so that the Dentistcan choose a pen grasp or a palm grasp depending on the individualpreferences of the Dentist. The proximal end of the handle region mayfurther include a dental pick, a dental probe, a dental hook, aperiosteal elevator, or a periosteal retractor or any other dentalinstrument.

Other features and advantages of the present invention will become morefully apparent and understood with reference to the followingdescription, the accompanying drawings and the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS

The various aspects and embodiments disclosed herein will be betterunderstood when read in conjunction with the appended drawings, whereinlike reference numerals refer to like components. For the purposes ofillustrating aspects of the present application, there are shown in thedrawings certain preferred embodiments. It should be understood,however, that the application is not limited to the precise arrangement,structures, features, embodiments, aspects, and devices shown, and thearrangements, structures, features, embodiments, aspects and devicesshown may be used singularly or in combination with other arrangements,structures, features, embodiments, aspects and devices. The drawings arenot necessarily drawn to scale and are not in any way intended to limitthe scope of this invention, but are merely presented to clarifyillustrated embodiments of the invention. In these drawings:

FIG. 1A is a perspective view of a first embodiment dental tool.

FIG. 1B is a side view of the dental tool of FIG. 1A.

FIG. 1C is a top view of the dental tool of FIG. 1A.

FIG. 1D is a bottom view of the dental tool of FIG. 1A.

FIG. 1E is a top detailed view of a tongue retractor portion of thedental tool shown in FIG. 1A.

FIG. 1F is a bottom detailed view of a tongue retractor portion of thedental tool shown in FIG. 1A.

FIG. 2A is a perspective view of a second embodiment dental tool.

FIG. 2B is a side view of the dental tool of FIG. 2A.

FIG. 2C is a top view of the dental tool of FIG. 2A.

FIG. 2D is a bottom view of the dental tool of FIG. 2A.

FIG. 2E is a top detailed view of a tongue retractor portion of thedental tool shown in FIG. 2A.

FIG. 2F is a bottom detailed view of a tongue retractor portion of thedental tool shown in FIG. 2A.

FIG. 3A is a perspective view of a third embodiment dental tool.

FIG. 3B is a side view of the dental tool of FIG. 3A.

FIG. 3C is a top view of the dental tool of FIG. 3A.

FIG. 3D is a bottom view of the dental tool of FIG. 3A.

FIG. 3E is a top detailed view of a tongue retractor portion of thedental tool shown in FIG. 3A.

FIG. 3F is a bottom detailed view of a tongue retractor portion of thedental tool shown in FIG. 3A.

FIG. 4A is a perspective view of a fourth embodiment dental tool.

FIG. 4B is a side view of the dental tool of FIG. 4A.

FIG. 4C is a top view of the dental tool of FIG. 4A.

FIG. 4D is a bottom view of the dental tool of FIG. 4A.

FIG. 4E is a top detailed view of a tongue retractor portion of thedental tool shown in FIG. 4A.

FIG. 4F is a bottom detailed view of a tongue retractor portion of thedental tool shown in FIG. 4A.

FIG. 5A is a perspective view of a fifth embodiment dental tool.

FIG. 5B is a side view of the dental tool of FIG. 5A.

FIG. 5C is a top view of the dental tool of FIG. 5A.

FIG. 5D is a bottom view of the dental tool of FIG. 5A.

FIG. 5E is a top detailed view of a tongue retractor portion of thedental tool shown in FIG. 5A.

FIG. 5F is a bottom detailed view of a tongue retractor portion of thedental tool shown in FIG. 5A.

FIG. 6A is a perspective view of a sixth embodiment dental tool.

FIG. 6B is a left side view of the dental tool of FIG. 6A.

FIG. 6C is a top view of the dental tool of FIG. 6A.

FIG. 6D is a bottom view of the dental tool of FIG. 6A.

FIG. 6E is a top detailed view of a tongue retractor portion of thedental tool shown in FIG. 6A.

FIG. 6F is a bottom detailed view of a tongue retractor portion of thedental tool shown in FIG. 6A.

FIG. 6G is a right side view of the dental tool of FIG. 6A.

FIG. 7A is a perspective view of a seventh embodiment dental tool.

FIG. 7B is a side view of the dental tool of FIG. 7A.

FIG. 7C is a top view of the dental tool of FIG. 7A.

FIG. 7D is a bottom view of the dental tool of FIG. 7A.

FIG. 7E is a top detailed view of a tongue retractor portion of thedental tool shown in FIG. 7A.

FIG. 7F is a bottom detailed view of a tongue retractor portion of thedental tool shown in FIG. 7A.

FIG. 8A is a perspective view of an eighth embodiment dental tool.

FIG. 8B is a left side view of the dental tool of FIG. 8A.

FIG. 8C is a top view of the dental tool of FIG. 8A.

FIG. 8D is a bottom view of the dental tool of FIG. 8A.

FIG. 8E is a top detailed view of a tongue and flap retractor portion ofthe dental tool shown in FIG. 8A.

FIG. 8F is a bottom detailed view of a tongue and flap retractor portionof the dental tool shown in FIG. 8A.

FIG. 8G is a right side view of the dental tool of FIG. 8A.

FIG. 9A is a perspective view of a ninth embodiment dental tool.

FIG. 9B is a side view of the dental tool of FIG. 9A.

FIG. 9C is a top view of the dental tool of FIG. 9A.

FIG. 9D is a bottom view of the dental tool of FIG. 9A.

FIG. 9E is a top detailed view of a tongue and flap retractor portion ofthe dental tool shown in FIG. 9A.

FIG. 9F is a bottom detailed view of a tongue and flap retractor portionof the dental tool shown in FIG. 9A.

FIG. 10A is a perspective view of a tenth embodiment dental tool.

FIG. 10B is a side view of the dental tool of FIG. 10A.

FIG. 10C is a top view of the dental tool of FIG. 10A.

FIG. 10D is a bottom view of the dental tool of FIG. 10A.

FIG. 10E is a top detailed view of a flap retractor portion of thedental tool shown in FIG. 1 OA.

FIG. 10F is a bottom detailed view of a flap retractor portion of thedental tool shown in FIG. 10A.

FIG. 11A is a perspective view of an eleventh embodiment dental tool.

FIG. 11B is a left side view of the dental tool of FIG. 11A.

FIG. 11C is a top view of the dental tool of FIG. 11A.

FIG. 11D is a right side view of the dental tool of FIG. 11A.

FIG. 11E is a bottom view of the dental tool of FIG. 11A.

FIG. 11F is a top detailed view of a flap retractor portion of thedental tool shown in FIG. 11A.

FIG. 11G is a bottom detailed view of a flap retractor portion of thedental tool shown in FIG. 11A.

FIG. 12A is a perspective view of a twelfth embodiment dental tool.

FIG. 12B is a top view of the dental tool of FIG. 12A.

FIG. 12C is a bottom view of the dental tool of FIG. 12A.

FIG. 12D is a top detailed view of a combined tongue and flap retractorportion of the dental tool shown in FIG. 12A.

FIG. 12E is a bottom detailed view of a combined tongue and flapretractor portion of the dental tool shown in FIG. 12A.

FIG. 13A is a perspective view of a thirteenth embodiment dental tool.

FIG. 13B is a top view of the dental tool of FIG. 13A.

FIG. 13C is a bottom view of the dental tool of FIG. 13A.

FIG. 13D is a top detailed view of a combined tongue and flap retractorportion of the dental tool shown in FIG. 13A.

FIG. 13E is a bottom detailed view of a combined tongue and flapretractor portion of the dental tool shown in FIG. 13A.

FIG. 13F is a side view of the dental tool of FIG. 13A.

FIG. 14A is a perspective view of a fourteenth embodiment dental tool.

FIG. 14B is a side view of the dental tool of FIG. 14A.

FIG. 14C is a top view of the dental tool of FIG. 14A.

FIG. 14D is a bottom view of the dental tool of FIG. 14A.

FIG. 14E is a top detailed view of a combined tongue and flap retractorportion of the dental tool shown in FIG. 14A.

FIG. 14F is a bottom detailed view of a combined tongue and flapretractor portion of the dental tool shown in FIG. 14A.

FIG. 15A is a perspective view of a fifteenth embodiment dental tool.

FIG. 15B is a side view of the dental tool of FIG. 15A.

FIG. 15C is a top view of the dental tool of FIG. 15A.

FIG. 15D is a bottom view of the dental tool of FIG. 15A.

FIG. 15E is a top detailed view of a combined tongue and flap retractorportion of the dental tool shown in FIG. 15A.

FIG. 15F is a bottom detailed view of a combined tongue and flapretractor portion of the dental tool shown in FIG. 15A.

FIG. 16A is a perspective view of a sixteenth embodiment dental tool.

FIG. 16B is a left side view of the dental tool of FIG. 16A.

FIG. 16C is a top view of the dental tool of FIG. 16A.

FIG. 16D is a bottom view of the dental tool of FIG. 16A.

FIG. 16E is a top detailed view of a combined tongue and flap retractorportion of the dental tool shown in FIG. 16A.

FIG. 16F is a bottom detailed view of a combined tongue and flapretractor portion of the dental tool shown in FIG. 16A.

FIG. 16G is a right side view of the dental tool of FIG. 16A.

FIG. 17A is a perspective view of a seventeenth embodiment dental tool.

FIG. 17B is a side view of the dental tool of FIG. 17A.

FIG. 17C is a top view of the dental tool of FIG. 17A.

FIG. 17D is a bottom view of the dental tool of FIG. 17A.

FIG. 17E is a top detailed view of a combined tongue and flap retractorportion of the dental tool shown in FIG. 17A.

FIG. 17F is a bottom detailed view of a combined tongue and flapretractor portion of the dental tool shown in FIG. 17A.

FIG. 18A is a perspective view of a eighteenth embodiment dental tool.

FIG. 18B is a left side view of the dental tool of FIG. 18A.

FIG. 18C is a top view of the dental tool of FIG. 18A.

FIG. 18D is a bottom view of the dental tool of FIG. 18A.

FIG. 18E is a top detailed view of a combined tongue and flap retractorportion of the dental tool shown in FIG. 18A.

FIG. 18F is a bottom detailed view of a combined tongue and flapretractor portion of the dental tool shown in FIG. 18A.

FIG. 18G is a right side view of the dental tool of FIG. 18A.

FIG. 19A is a perspective view of a nineteenth embodiment dental tool.

FIG. 19B is a left side view of the dental tool of FIG. 19A.

FIG. 19C is a top view of the dental tool of FIG. 19A.

FIG. 19D is a bottom view of the dental tool of FIG. 19A.

FIG. 19E is a top detailed view of a tongue retractor portion of thedental tool shown in FIG. 19A.

FIG. 19F is a bottom detailed view of a tongue retractor portion of thedental tool shown in FIG. 19A.

FIG. 19G is a right side view of the dental tool of FIG. 19A.

FIG. 20A is a perspective view of a twentieth embodiment dental tool.

FIG. 20B is a side view of the dental tool of FIG. 20A.

FIG. 20C is a top view of the dental tool of FIG. 20A.

FIG. 20D is a bottom view of the dental tool of FIG. 20A.

FIG. 20E is a top detailed view of a tongue retractor portion of thedental tool shown in FIG. 20A.

FIG. 20F is a bottom detailed view of a tongue retractor portion of thedental tool shown in FIG. 20A.

FIG. 21A is a perspective view of a twenty-first embodiment dental tool.

FIG. 21B is a side view of the dental tool of FIG. 21A.

FIG. 21C is a top view of the dental tool of FIG. 21A.

FIG. 21D is a bottom view of the dental tool of FIG. 21A.

FIG. 21E is a top detailed view of a tongue retractor portion of thedental tool shown in FIG. 21A.

FIG. 21F is a bottom detailed view of a tongue retractor portion of thedental tool shown in FIG. 21A.

FIG. 22A is a perspective view of a twenty-second embodiment dentaltool.

FIG. 22B is a side view of the dental tool of FIG. 22A.

FIG. 22C is a top view of the dental tool of FIG. 22A.

FIG. 22D is a bottom view of the dental tool of FIG. 22A.

FIG. 22E is a top detailed view of a combined tongue and flap retractorportion of the dental tool shown in FIG. 22A.

FIG. 22F is a bottom detailed view of a combined tongue and flapretractor portion of the dental tool shown in FIG. 22A.

FIG. 23A is a perspective view of a twenty-third embodiment dental tool.

FIG. 23B is a top view of the dental tool of FIG. 23A.

FIG. 23C is a side view of the dental tool of FIG. 23A.

FIG. 23D is a bottom view of the dental tool of FIG. 23A.

FIG. 23E is a front view of the dental tool shown in FIG. 23A.

FIG. 23F is a back view of the dental tool shown in FIG. 23A.

FIG. 24A is a perspective view of a twenty-fourth embodiment dentaltool.

FIG. 24B is a top view of the dental tool of FIG. 24A.

FIG. 24C is a left side view of the dental tool of FIG. 24A.

FIG. 24D is a right side view of the dental tool of FIG. 24A.

FIG. 24E is a bottom view of the dental tool of FIG. 24A.

FIG. 24F is a front view of the dental tool shown in FIG. 24A.

FIG. 24G is a back view of the dental tool shown in FIG. 2$A.

FIG. 25A is a perspective view of a twenty-fifth embodiment dental tool.

FIG. 25B is a top view of the dental tool of FIG. 25A.

FIG. 25C is a side view of the dental tool of FIG. 25A.

FIG. 25D is a bottom view of the dental tool of FIG. 25A.

FIG. 25E is a front view of the dental tool shown in FIG. 25A.

FIG. 25F is a back view of the dental tool shown in FIG. 25A.

FIG. 26A is a perspective view of a twenty-sixth embodiment dental tool.

FIG. 26B is a top view of the dental tool of FIG. 26A.

FIG. 26C is a left side view of the dental tool of FIG. 26A.

FIG. 26D is a right side view of the dental tool of FIG. 26A.

FIG. 26E is a bottom view of the dental tool of FIG. 26A.

FIG. 26F is a front view of the dental tool shown in FIG. 26A.

FIG. 26G is a back view of the dental tool shown in FIG. 26A.

FIG. 27A is a perspective view of a twenty-seventh embodiment dentaltool.

FIG. 27B is a top view of the dental tool of FIG. 27A.

FIG. 27C is a left side view of the dental tool of FIG. 27A.

FIG. 27D is a right side view of the dental tool of FIG. 27A.

FIG. 27E is a bottom view of the dental tool of FIG. 27A.

FIG. 27F is a front view of the dental tool shown in FIG. 27A.

FIG. 27G is a back view of the dental tool shown in FIG. 27A.

FIG. 28A is a perspective view of a twenty-eighth embodiment dentaltool.

FIG. 28B is a top view of the dental tool of FIG. 28A.

FIG. 28C is a left side view of the dental tool of FIG. 28A.

FIG. 28D is a right side view of the dental tool of FIG. 28A.

FIG. 28E is a bottom view of the dental tool of FIG. 28A.

FIG. 28F is a front view of the dental tool shown in FIG. 28A.

FIG. 28G is a back view of the dental tool shown in FIG. 28A.

FIG. 29A is a perspective view of a twenty-ninth embodiment dental tool.

FIG. 29B is a bottom view of the dental tool of FIG. 29A.

FIG. 29C is a side view of the dental tool of FIG. 29A.

FIG. 29D is a top view of the dental tool of FIG. 29A.

FIG. 29E is a front view of the dental tool shown in FIG. 29A.

FIG. 29F is a back view of the dental tool shown in FIG. 29A.

FIG. 30A is a perspective view of a thirtieth embodiment dental tool.

FIG. 30B is a bottom view of the dental tool of FIG. 30A.

FIG. 30C is a side view of the dental tool of FIG. 30A.

FIG. 30D is a top view of the dental tool of FIG. 30A.

FIG. 30E is a front view of the dental tool shown in FIG. 30A.

FIG. 30F is a back view of the dental tool shown in FIG. 30A.

FIG. 31A is a perspective view of a thirty-first embodiment dental tool.

FIG. 31B is a top view of the dental tool of FIG. 31A.

FIG. 31C is a side view of the dental tool of FIG. 31A.

FIG. 31D is a bottom view of the dental tool of FIG. 31A.

FIG. 31E is a front view of the dental tool shown in FIG. 31A.

FIG. 31F is a back view of the dental tool shown in FIG. 31A.

FIGS. 32A-32C are side, perspective and end views of an embodimenthandle, respectively.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring now to the drawings, FIGS. 1A-1F show an embodiment tool 100.The tool 100 has a generally longitudinal shape with a first, proximalend 101 and a second, distal end 102. The tool 100 may be formed ofstainless steel, carbide, plastic or resin, or any other suitablematerial known in the art, and may include a first operational unit 110disposed on the proximal end 101 and a second operational unit 120disposed on the distal end 102. Further, the densities of the materialsused may be varied as well, so as to provide heavier or lighterinstruments as may be desirable for the end user. For example, densergrades of stainless steel may be used to create a relatively heavierproduct. The embodiment tool 100 may also be disposable. The tool 100further includes a handle region 130, a first neck region 140 disposedbetween the first operational unit 110 and the handle region 130, and asecond neck region 150 disposed between the second operational unit 120and the handle region 130. The handle region 130 may be thick, narrow,round, flat or have various combinations thereof.

The tool 100 may be integrally formed as a unitary structure, or, morepreferably, is formed by separate units that are releasably mechanicallylinked together. Any suitable mechanical connection as known in the artmay be used to releasably connect the various components together toform the tool 100. For example, the first operational unit 110 and firstneck region 140 may be integrally formed as a single unit thatmechanically couples, such as by a threaded section on the distal end offirst neck region 140, to the handle region 130; the handle region 130may also be integrally formed as a single unit having a correspondingthreaded section on its proximal end to accept the mating threadedsection of the first neck region 140. Similarly, the distal end ofhandle region 130 may also have a threaded section to accept acorresponding mating threaded section on the proximal end of the secondneck region 150, in which the second neck region 150 is integrallyformed with the second operational unit 120. Many variations arecontemplated and are within the scope of the present invention. Forexample, the handle region 130, first neck region 140 and firstoperational unit 110 may all be integrally formed as a single unit,which is threadedly or otherwise mechanically attached to the secondneck region 150 and second operational unit 120, which portions 120, 150may again be integrally formed as a single unit. For example, asillustrated in FIGS. 1E and 1F, the second neck region 150 and secondoperational unit 120 may be integrally formed as a single unit. Aproximal end 151 of the second neck region 150 may include a threadedsection 159, such as a threaded protrusion or a threaded aperture, tocorrespondingly mate with a threaded section on the distal end of thehandle region 130.

The handle region 130 is used as a gripping region by the Dentist in themanipulation of the tool 100 and may be generally circular, hexagonal,octagonal, flat or the like in cross-section perpendicular to itslength; the handle region 130 preferably has knurls 132 or other surfacetexturing to improve the Dentist's grip upon the handle region 130.Alternatively, the handle region 130 may include an exterior gripmaterial made of plastic, rubber or any other suitable material. Aparticularly preferred embodiment handle region is discussed later,which may be employed in any of the embodiment tools discussed in thefollowing. Portions of the tool 100 may be formed so as to be hollow orsolid in construction. Additionally, it will be appreciated that thecross-sectional shape of the various portions 110, 140, 130, 150, 120 ofthe tool 100 may be in different shapes, and preferably may vary in asubstantially continuous manner from the proximal end 101 to the distalend 102.

As shown in FIGS. 1B and 1C, the longitudinal length of the handleregion 130 may define a longitudinal direction 1. A lateral direction 2,corresponding to side-to-side motion of the ends 101, 102, isperpendicular to the longitudinal direction 1, while a transversedirection 3 is perpendicular to both the longitudinal direction 1 andthe lateral direction 2, corresponding to up-and-down motion of the ends101, 102. These directions (longitudinal, lateral and transverse) areused throughout the following to describe features of the variousembodiments.

In the embodiment tool 100, the second operational unit 120 includes aconcave tongue retractor 120. The concave tongue retractor 120 is usedto retract the tongue away from the treatment area where the Dentist isworking. The concave tongue retractor 120 is used to retract and/orisolate the tongue during a procedure. As can be appreciated from FIGS.1A-1F, the concave tongue retractor 120 is preferably shaped to providefor a natural area to encapsulate a portion of the tongue, therebyremoving it from the treatment area. In cross-section along thetransverse plane (i.e., in the plane defined by directions 1 and 3 andbest illustrated in FIG. 1B), the tongue retractor 120 has a circular,or more preferably a semi-circular, shape to provide a concave ventralsurface 122 and a corresponding convex dorsal surface 124, in which theventral surface 122 is the working surface that is designed to come intodirect contact with the patient's tongue. The curve may extend throughapproximately 30 degrees to 160 degrees of arc, more preferably throughabout 70 degrees to 100 degrees of arc, more preferably still throughabout 80 to 90 degrees of arc. Preferably, as a semi-circular arc incross-section within the transverse plane, the major axis of the tongueretractor 120 is more closely aligned along the transverse direction 3(or along the distal extents of the retractor 120) while the minor axisis more closely aligned along the longitudinal direction 1 (orperpendicular to the distal extents—i.e., perpendicular to the bottomsurface 122); the major axis of the tongue retractor may be, forexample, at least 50% greater than its minor axis. Similarly, the tongueretractor 120 also has a curved shape, preferably circular, incross-section along the lateral plane (i.e., the plane defined bydirections 1 and 2 and best illustrated in FIG. 1C), which furtherincreases the concave nature of ventral surface 122 and the convexnature of dorsal surface 124. The tongue retractor 120 preferableextends through 5 to 90 degrees of arc, more preferably still through 10to 45 degrees of arc, more preferably still through about 20 to 30degrees of arc, in the cross-section of the lateral plane. The distalend 102 of the tongue retractor 120 may have extents along the lateraldirection 2 from about 10 mm to 40 mm, and preferably of about 25 mm,providing a curved length along the lateral direction 2 that is slightlygreater than this depending upon the desired amount of curvature. Thetongue retractor 120 may have extents along the longitudinal direction 1from about 19 mm to about 51 mm, and preferably about 32 mm, which maysimilarly provide for a slightly greater curved length. The lateralextents 2 of the distal end 102 may range from about 15 mm to about 40,more preferably about 26 mm.

For purposes of the following, a dorsal direction is a direction alongthe transverse direction 3 towards which the dorsal surface 124 faces(i.e., an “upward” direction), whereas a ventral direction is thedirection along the transverse direction 3 that is opposite to thedorsal direction—i.e., in the direction which the ventral surface 122faces, the “downward” direction. In this embodiment 100, the first neckregion 140 may be straight and thus extend along and parallel to thelongitudinal direction 1. In contrast, the second neck region 150 isstraight in the lateral plane (the plane defined by longitudinaldirection 1 and lateral direction 2), as shown in FIG. 1C, but is bentin the transverse plane (the plane defined by longitudinal direction 1and transverse direction 3), as shown in FIG. 1B. The second neck region150 includes a first angle or bend 152 that angles ventrally in thetransverse direction 3, and then a more distal second angle or bend 154that angles dorsally in the transverse direction 3. The angles of thebends 152, 154 may be substantially equal so that the distal end of thesecond neck 150 terminates in a direction that is substantially parallelto the distal end of handle region 130 but merely offset ventrally by atransverse distance. Or, more preferably, the distal upward bend 154 maybe less than the initial proximal bend 152 so that the distal end 102 ofthe second neck region 150 points slightly ventrally in the transversedirection with respect to the distal end 102 of the handle region 130.

The ventral, transverse offset is advantageously designed to more easilynavigate the anatomy of the patient to reach the working area; moreparticularly, the second operational unit 120 is disposed ventrallytowards the patient with respect to the handle region 130, which makesit easier to navigate around the anatomy of the patient whenapproaching, for example, from the contralateral side. This ventraloffset provides the unexpected benefit of reducing strain upon theDentist when retracting tissue or anatomy, such as a patient's tongue.In particular, this ventral offset, and optional ventral angle, of thesecond operation unit 120 permits the second operational unit 120 to bemore easily manipulated with handle region 130, as second neck region150 more conveniently clears the teeth and jaw of the patient. Inpreferred embodiments the ventral distance between the proximal end 151of the second neck region 150 and the distal end 158 of the second neckregion 150 in the transverse direction 3 is from about 5 mm to 32 mm,more preferably from 10 mm to 26 mm, more preferably still from about 15mm to 20 mm. The combination of the first bend 152 and the second bend154 gives the second neck region 150 a generally S-shaped or steppedappearance, and for purposes of this disclosure are termed “S-shaped”bends. The first bend 152 may pass through from 10 to 90 degrees of arc,more preferably through from 30 to 60 degrees of arc, more preferablystill through about 45 degrees of arc, and extend in a related directionfor from 7 to 30 mm, more preferably from 10 to 20 mm, more preferablystill from 13 to 17 mm. The second bend 154 may pass through from 5 to90 degrees of arc, more preferably through from 15 to 60 degrees of arc,more preferably still through about 30 degrees of arc, and extend in arelated direction of from 7 to 30 mm, more preferably from 10 to 20 mm,more preferably still from 13 to 17 mm. The second bend 154 provides asurface onto which the second operational unit 120 is mounted. Forexample, the dorsal surface 124 of second operational unit 120 may bebonded to a ventral surface of the second bend 154. Or, the secondoperational unit 120 may be embedded within the second bend 154, so thatportions of the second bend 154 extend over both the ventral surface 122and the dorsal surface 124 of the operational unit 120.

The S-shaped neck region 150 creates a ventral, transverse spatialdisplacement of the operational unit 120, and optionally a ventral,transverse angular displacement of the operational unit 120 as well. Forexample, the lateral plane of the operational unit 120 (which may bedefined, for example, by the lateral and longitudinal extents of theoperational unit 120) may be angled in a ventral, transverse direction 3with respect to the lateral plane of the tool 100 (which may be defined,for example, by the longitudinal direction 1 and the lateral direction2). These transverse displacements, both angular and spatial, help toposition the tool with respect to the location of the mandible, which istypically inferior to the position of the Dentist, and consequentlyprovide a more ergonomic design that requires less force and thusresults in less fatigue for the Dentist, and also help the handle region130 to more easily clear the teeth and mandible of the patient. Inpreferred embodiments, the ventral, transverse angular displacement ofthe operational unit 120 is from 0 degrees to 90 degrees with respect tothe longitudinal axis 1 of the handle region 130, more preferably from15 degrees to 60 degrees, more preferably still from 20 degrees to 30degrees. It should be appreciated that in some alternative embodiments,the neck region may be smoothly bent across its length to provide thedesired curvature and spatial displacements, rather than providing for adiscrete number of individual bends as shown in the discussed preferredembodiments; such smoothly bend configurations are also considered“S-shaped bends” for purposes of the following disclosure. In suchembodiments, it will be appreciated that they still includesubstantially first and second bends with corresponding angular andspatial extents as discussed above.

The embodiment tool 100 provides improved ergonomics through the use ofS-shaped bends 152, 154. These ergonomic features can be optionallyincorporated into each of the other tools and embodiments discussedherein. The ventral, S-shape of the second neck region 150 allows thetool 100, and in particular the tongue retractor 120, to align moreoptimally within the oral cavity, such that a greatly reduced amount offorce is needed in the transverse direction 3. More specifically, theventral orientation provided by the S-shaped region 150 in effectprovides the ventral (i.e., downward) motion typically needed to retracta tongue, and as a result greatly reduces the effort required by aDentist to perform such tongue retraction. This dramatically decreasesthe Dentist's fatigue and discomfort, and avoids prolonged strain on theneck, shoulder, arm, back, and hand, thus reducing the risk of injury tothe Dentist.

The first operational unit 110 may optionally be present, or theproximal end 101 of the handle region 130 may terminate in a suitableshape or with a suitable fitting. By way of example, however, the firstoperational unit 110 may be, for example, screwed onto the proximal end101 of the handle region 130 to provide additional functionality to thetool 100. For example, the first operational unit 110 may be aperiosteal elevator 123. Furthermore, as can be appreciated by thoseskilled in the art, the proximal end of the handle 120 may insteadinclude a dental probe, a dental hook, or other useful apparatus. Inother embodiments, the entire tool may be integrally formed so that thehandle region, neck region and operational unit are all formed togetheras a single unit.

In the following, various embodiment tools are discussed. It will beappreciated that features from the embodiment tool 100, or indeed fromany other embodiment tool discussed herein, may be used within the otherrespective embodiments discussed. Specifically, the S-shaped neck region150, with its related angular and spatial parameters, may besuccessfully employed. For the sake of brevity, only specific featuresof a particular embodiment that have not been previously introduced arediscussed in that embodiment, and it will be appreciated that it may bepossible to then incorporate such features into other embodiments, suchas specific angular offsets or spatial extents.

FIGS. 2A-2F illustrate another embodiment tool 200 having an S-shapedsecond neck region 250 coupling a second embodiment tongue retractor 220to a handle region 230. Compared to the first embodiment tongueretractor 120, the embodiment tongue retractor 220 has increased extentsalong the lateral direction 2—i.e., is wider. This may accommodate, forexample, a patient with a larger mouth or tongue, and thus provide toolstailored to the specific anatomy of the patient. In preferredembodiments the tongue retractor 220 extends along the lateral direction2 by about 15 mm to 45 mm, more preferably from 20 mm to 35 mm, morepreferably still about 28 mm. The tongue retractor 220 may extendthrough 15 to 180 degrees of arc along the lateral direction 2, morepreferably from 30 to 100 degrees of arc, more preferably still from 40to 60 degrees of arc.

FIGS. 3A-3F illustrate another embodiment tool 300 having an S-shapedsecond neck region 350 coupling an operational unit 320, such as atongue retractor 320 similar to the tongue retractor 120, to a handleregion 330. In this embodiment the S-shaped second neck region 350 isbent both in the transverse plane (i.e., the plane as defined bylongitudinal direction 1 and the transverse direction 3, best shown inFIG. 3B), and is also bent within the lateral plane (i.e., the plane asdefined by longitudinal direction 1 and the lateral direction 2, bestshown in FIG. 3C). Such lateral bending or offsets may accommodate thecurvature of the mandible, which can be significant when working on theleft or right side of the mandible, by using a correspondingly curvedtool. Hence, it will be appreciated that tools herein may be providedthat have predetermined bends to the right or left in the lateraldirection 2 as needed based upon the intended working location in themandible. The neck region 350 may include a first bend 352 and a secondbend 354 (or a smoothly curved structure which functionally approximatessuch bends), and at least one of the bends 352 or 354 makes an angularoffset in the lateral direction 2 so that the centerline of theoperational unit 320 is laterally offset, both spatially and angularly,from the centerline of the handle region 330. In preferred embodiments,the second bend 354 (i.e, most distal bend) provides all of the lateralangling of the operational unit of the tool. The ventral, transversedisplacement 3, both spatially and angularly, of the distal end 358 ofthe neck 350 with respect to the proximal end 351 of the neck 350 maybe, for example, as discussed above with reference to the embodiments100, 200. In addition, however, the distal end 358 of the neck 350 willhave also gone through a lateral displacement 2. The spatial lateraldisplacement 2 of the distal end 358 of the neck 350 with respect to theproximal end 351 of the neck 350 may be, for example, from 5 mm to 30mm, more preferably from 10 mm to 20 mm, more preferably about 15 mm,providing a corresponding spatial lateral displacement of theoperational unit 320 with respect to the handle region 330. The angularlateral displacement of the distal end 358 of the neck 350 with respectto the proximal end 351 of the neck 350 (and thus the longitudinaldirection 1 and the handle region 330) may be, for example, from 0 to 90degrees, more preferably from 20 to 40 degrees, more preferably about 22or 33 degrees, providing a corresponding angular lateral displacement ofthe operational unit 320 with respect to the handle region 330. Althoughin preferred embodiments the most distal bend 354 provides the totalangular lateral displacement of the operational unit 320, in otherembodiments each bend 352, 354 may provide part of the total angularlateral displacement of the operational unit 320. In such designs theneck region 350 is S-shaped in the transverse plane (as shown in FIG.3B) but is C-shaped (if both bends 352, 354 have lateral angulardisplacements) or L-shaped (if only one bend 352, 354 has a lateralangular displacement) in the lateral plane (as shown in FIG. 3C). SuchC-shaped or L-shaped curvatures may be considered “concave curvatures”for purposes of this disclosure. Other designs are certainly possible,however, such as designs in which one bend 352 or 354 increases thelateral angular displacement while another bend 354 or 352 reduces thelateral angular displacement, so that the neck 350 is S-shaped in boththe transverse and lateral planes.

The embodiment neck design 350 allows the Dentist to utilize the tool300 in a dramatically less awkward fashion, in particular allowing theDentist to navigate the tool 300 on one particular side of the mandible.Furthermore, this neck design 350 allows a Dentist to reduce oreliminate the need for twisting or turning of the torso, upperextremities (e.g., the arm and hand), and head and neck in an effort touse the tool 300.

FIGS. 4A-4F illustrate another embodiment tool 400, having an embodimenttongue retractor 420 coupled via a neck region 450 to a handle region430. The neck region 450 may be, for example, S-shaped in the transverseplane (defined by arrows 1 and 3) but straight in the lateral plane(defined by arrows 1 and 2). The embodiment tongue retractor 420 issimilar to the embodiment tongue retractor 120 in terms of spatialextents but further includes an exaggerated concavity towards its distallip 402. In particular, when viewed in the transverse plane, as in FIG.4B, the tongue retractor 420 has a curved shape in which the majority ofthe curvature occurs in the most distal third of the retractor 420,thereby forming a more pronounced concavity for the ventral surface 422that terminates in lip 402, in which lip 402 is angled from 45 to 170degrees with respect to the lateral plane, more preferably from 85 to150 degrees, and more preferably still at about 110 to 130 degrees withrespect to the lateral plane, so that, in effect, the tongue retractor420 curves back upon itself.

FIGS. 5A-5F illustrate another embodiment tool 500, having a tongueretractor 520 similar to the tongue retractor 420 that is coupled via aneck region 550 to a handle region 530. In the embodiment tool 500 theneck region 550 is S-shaped in the transverse plane (defined by arrows 1and 3) and is L-shaped in the lateral plane (defined by arrows 1 and 2).Hence, the tongue retractor 520 is laterally offset from the handleregion 530, both spatially and angularly, such as by about 20 to 45degrees, more preferably between 22 and 33 degrees, with 22 and 33degrees being respectively particularly preferred. It will beappreciated that the tool 500 could have lateral bends in directionsopposite to those shown herein as, for example, based upon the intendeduse around the mandible, such as to the right or to the left.

FIGS. 6A-6F illustrate another embodiment tool 600, having an embodimenttongue retractor 620. The embodiment tongue retractor 620 has asubstantially straight planar end 627 that creates a surface that isapproximately perpendicular to the lateral plane defined by thelongitudinal direction 1 and the lateral direction 2. The planar end 627may be about 15 mm to 45 mm wide in the lateral direction 2, preferablyabout 25 mm wide, and about 5 mm to 30 mm long in the transversedirection 3, preferably about 15 mm long. A central bend 625 providesthe majority of the transverse curvature, thereby forming apredominantly L-shaped cross-section for the tongue retractor 620 in thelateral plane, as best shown in FIG. 6B. In other embodiments the tongueretractor 620 may cover larger spatial extents—i.e., a larger sizedtongue retractor. In such embodiments the planar end may be about 35 mmwide in the lateral direction 2, and about 25 mm long in the transversedirection 3.

FIGS. 7A-7F illustrate another embodiment tool 700, having a tongueretractor 720 similar to the embodiment tongue retractor 620, which iscoupled to the handle region 730 by way of a neck region 750 that isS-shaped in the transverse plane (defined by the longitudinal direction1 and the transverse direction 3, as shown in FIG. 7B), and C-shaped inthe lateral plane (defined by the longitudinal direction 1 and thelateral direction 2, as shown in FIG. 7C). The lateral angular andspatial offsets may be similar to those discussed in relation to earlierembodiments, with 22 and 33 degrees being particularly preferred for thelateral angular offset as they align nicely with the anatomy of themandible, although any angles between 0 and 180 degrees are alsocontemplated.

FIGS. 8A-8G illustrate another embodiment tool 800, having an embodimentcombined tongue and flap retractor 820, which is coupled to the handleregion 830 by way of a neck region 850 that is S-shaped in thetransverse plane (defined by the longitudinal direction 1 and thetransverse direction 3, as shown in FIGS. 8B and 8G), and straight inthe lateral plane (defined by the longitudinal direction 1 and thelateral direction 2, as shown in FIGS. 8C and 8D). The flap retractor820 makes it useful for reflecting a soft tissue flap, such as thegingiva and/or gingival mucosa and/or connective tissue that has beenraised as a surgical flap on the lingual aspect of the mandible.However, the exceptional thickness of the working end of the tool alsomakes it suitable for use as a tongue retractor, providing thesturdiness needed to reflect the relatively strong muscle of the tongue.The flap retractor 820 has a top face 824 that is substantially parallelto a bottom face 822, in which these faces 822, 824 are separated fromeach other by a lateral sidewall 826 providing a uniform thickness offrom 0.1 mm to 5 mm, more preferably still from 2 mm to 4 mm, and morepreferably about 3 mm. It is this unconventional thickness that givesthe tool 800 its unexpected tongue-retracting abilities. In some otherembodiments, at its most distal edge, this thickness may taper, such asto about 0.1 mm in thickness. Alternatively, the top face 824 and bottomface 822 may not be parallel to each other, but instead angled toprovide a gentle tapering from the proximal end to the distal end. Thelateral sidewall 826 extends around the sides and distal end of the flapretractor 820 and is substantially perpendicular to the top and bottomfaces 822, 824. The distal end 802 of the flap retractor 820 issemicircular in shape, and preferably has extents along the lateraldirection 2 from 5 to 30 mm, more preferably 10 mm to 20 mm, morepreferably still about 15 mm. The ventral surface of the combined tongueand flap retractor 820 preferably has extents along the longitudinaldirection 1 of from 5 mm to 40 mm, preferably from 10 mm to 30 mm, morepreferably still about 28 mm. The embodiment flap retractor 820 is shownhaving a flat distal surface; it will be appreciated, however, that thedistal edge of flap retractor 820 may also be curved.

FIGS. 9A-9F illustrate another embodiment tool 900, having a combinedtongue and flap retractor 920. In the embodiment tool 900 the neckregion 950 is S-shaped in the transverse plane (defined by longitudinaldirection 1 and transverse direction 3 and best shown in FIG. 9B) and isC-shaped in the lateral plane (defined by longitudinal direction 1 andlateral direction 2 and best shown in FIGS. 9C and 9D). Hence, theretractor 920 is laterally offset from the handle region 930, bothspatially and angularly, such as by about 25 to 40 degrees transversely,preferably about 30 degrees, and 30 degrees laterally, or morepreferably 22 or 33 degrees laterally, with a corresponding transversespatial displacement and a lateral spatial displacement as discussed inreference to earlier embodiments. In shape the embodiment tongue andflap retractor 920 is similar to the embodiment tongue and flapretractor 820. However, unlike the earlier embodiment flap retractor820, the lateral sidewall 926 between the top surface 924 and bottomsurface 922 is not substantially perpendicular to these surfaces 922,924. Instead, the sidewall 926 is angled or beveled, such as by 1 to 60degrees to the bottom surface 922, more preferably by 10 to 60 degrees,more preferably still by 15 to 45 degrees, yet more preferably still byabout 33 degrees. Also, the length of the ventral surface of combinedtongue and flap retractor 920 along the longitudinal direction 1 may befrom 15 mm to 30 mm, more preferably 18 to 25 mm, more preferably still20 mm. The dorsal surface 924 is thus slightly smaller in area than theventral surface 922, and the sidewall 926 forms a beveled surface thatmakes it easier for the Dentist to insert the flap retractor 920 into anincision to hold the flap of soft tissue (such as gingiva, gingivalmucosa and/or connective tissue) away from the treatment area. As in theabove embodiment 800, it will be appreciated that the lateral sidewall926 may also be curved.

FIGS. 10A-10F illustrate another embodiment tool 1000, having anembodiment tongue and flap retractor 1020. In the embodiment tool 1000the neck region 1050 is S-shaped in the transverse plane (defined bylongitudinal direction 1 and transverse direction 3 and best shown inFIG. 10B) and is straight in the lateral plane (defined by longitudinaldirection 1 and lateral direction 2 and best shown in FIGS. 10C and10D), although it will be appreciated that bends in the lateraldirection are also contemplated. In shape the embodiment tongue and flapretractor 1020 is similar to the earlier embodiment flap retractor 920.However, the spacing between the dorsal surface 1024 and the ventralsurface 1022 is less than that in the earlier embodiment flap retractors820, 920. For this embodiment flap retractor 1020, the distance betweenthe dorsal surface 1024 and the ventral surface 1022 is from 0.5 mm to2.0 mm, more preferably from 0.8 mm to 1.5 mm, more preferably stillabout 1.0 mm. Because of its thinner aspect, the beveling of thesidewall 1026 may be steeper than in the second embodiment tongue andflap retractor 920. For example, the sidewall 1026 can be angled byabout 45 degrees. The tool 1000 may be configured to have a smallerprofile along the lateral 2 and longitudinal 1 extents for negotiatingsmall anatomies, such as in children. Also, the tool 1000 may be welladapted for working in the lingual anterior region where the soft tissueis thin. The distal end of the flap retractor 1020 is semicircular orflat in shape, and preferably has extents along the lateral direction 2from 3 to 24 mm, more preferably 5 mm to 18 mm, more preferably stillabout 12 mm. The ventral surface of the flap retractor 1020 preferablyhas extents along the longitudinal direction 1 of from 5 mm to 36 mm,preferably from 8 mm to 24 mm, more preferably still about 18 mm. As inthe above embodiments 800, 900, it will be appreciated that the lateralsidewall 1026 may also be curved.

FIGS. 11A-11G illustrate another embodiment tool 1100, having a tongueand flap retractor 1120 similar to the tongue and flap retractor 1020,which is coupled to the handle region 1130 by way of a neck region 1150that is S-shaped in the transverse plane (defined by the longitudinaldirection 1 and the transverse direction 3, as shown in FIG. 11B), andC-shaped in the lateral plane (defined by the longitudinal direction 1and the lateral direction 2, as shown in FIG. 11C). The lateral andtransverse angular and spatial displacements may be as described inrelation to the earlier embodiments; preferred bends, however, are 22 to33 degrees in the left or right lateral directions based upon theworking location on the mandible.

FIGS. 12A-12E FIGS. illustrate another embodiment tool 1200, having anembodiment combined tongue and flap retractor 1220, which is coupled toa distal end of the handle region 1230 by way of a neck region 1250 thatis S-shaped in the transverse plane. The combined tongue and flapretractor 1220 has a tongue retractor portion 1227 that is shapedsubstantially similarly to the first embodiment tongue retractor 120.However, a flap retractor portion 1228 extends distally, substantiallyalong the longitudinal direction 1, from the distal end 1229 of thetongue retractor portion 1227. The tongue retractor portion 1227 is thusdisposed proximal to the flap retractor portion 1228, with the flapretractor portion 1228 being located at a most distal region of thedevice 1200. The flap retractor portion 1228 may be centrally alignedwith the tongue retractor portion 1227, and can include a beveled edge1226 to facilitate insertion of the flap retractor portion 1228 into anincision in order to reflect a soft tissue flap (e.g., gingiva, gingivalmucosa and/or connective tissue). The flap retractor portion 1228 mayhave a lateral width 2 and thickness (which beveled surface 1226 extendsthrough) similar to other embodiment flap retractors disclosed herein,but preferably from about 0.3 to 1 mm, and a longitudinal length 1 (asmeasured from the connection location with the tongue retractor portion1227 to the most distal end of the flap retractor portion 1228) of from1 mm to 15 mm, preferably from 2 mm to 10 mm, more preferably stillabout 6 to 7 mm. The width 2 is preferably about 5 to 20 mm, morepreferably 10 mm to 15 mm, more preferably still about 13 mm. Anysuitable angle, for example as discussed in certain embodiments above,may be used for the angle of the beveled edge 1226. Sidewalls asdisclosed with reference to the first embodiment flap retractor 800 mayalso be employed rather than beveled edges 1226. In some embodiments thedorsal surface 1224 (or ventral surface) of the flap retractor portion1228 is parallel with the lateral plane defined by the longitudinaldirection 1 and the lateral direction 2 (i.e., a planar surfaceperpendicular to the transverse direction). However, in preferredembodiments the dorsal surface 1224 (or ventral surface) is at an angle,in the ventral, transverse direction, to the lateral plane, such as from0 degrees to 75 degrees, more preferably from 5 to 60 degrees, morepreferably still from 5 degrees to 45 degrees, and yet more preferablystill at about 15 degrees to the longitudinal axis 1 of the handleregion. The combined tongue and flap retractor 1220 may be used toperform both functions (tongue retraction and flap retraction)simultaneously or separately depending on the Dentist's needs. Combiningthese functions into a single device 1200 eliminates the need for twoseparate devices in the oral cavity during procedures, frees up a handof the Dentist for other potential uses or eliminates the need to havean assistant's hand in the treatment area, shortening the time ofoperation. In some embodiments a shortened flap retractor portion 1228may be provided, which may be useful if the anatomy is small, i.e.,children or small adults, such as a retractor that is 1 mm to 4 mm inlength, more preferably about 2 mm in length.

FIGS. 13A-13F illustrate another embodiment tool 1300, having a combinedtongue and flap retractor 1320 similar to the embodiment tongue and flapretractor 1220, which is coupled to the handle region 1330 by way of aneck region 1350 that is S-shaped in the transverse plane (defined bythe longitudinal direction 1 and the transverse direction 3, as shown inFIG. 13F), but which is C-shaped in the lateral plane (defined by thelongitudinal direction 1 and the lateral direction 2, as shown in FIGS.13B and 13C). Any suitable angular and spatial offsets may be used, asdiscussed in the earlier embodiment tools.

FIGS. 14A-14F illustrate another embodiment tool 1400, having anembodiment combined tongue and flap retractor 1420 that is similar tothe earlier embodiment combined tongue and flap retractor 1220 but inwhich the tongue retractor portion 1427 is shaped similarly to theembodiment tongue retractor 420 to provide an exaggerated cavity toretract the patient's tongue. The combined tongue and flap retractor1420 is coupled to the handle region 1430 by way of a neck region 1450that is S-shaped in the transverse plane (defined by the longitudinaldirection 1 and the transverse direction 3, as shown in FIG. 14B), andstraight in the lateral plane (defined by the longitudinal direction 1and the lateral direction 2, as shown in FIGS. 14C and 14D).

FIGS. 15A-15F illustrate another embodiment tool 1500, having a combinedtongue and flap retractor 1520 similar to the embodiment tongue and flapretractor 1420, which is coupled to the handle region 1530 by way of aneck region 1550 that is S-shaped in the transverse plane (defined bythe longitudinal direction 1 and the transverse direction 3, as shown inFIG. 15B), but which is L-shaped in the lateral plane (defined by thelongitudinal direction 1 and the lateral direction 2, as shown in FIGS.15C and 15D). The lateral angular displacement of the combined tongueand flap retractor 1520 may be as discussed in earlier embodiment tools,for example, from 0 degrees to 180 degrees, but preferably from 20degrees to 35 degrees, more preferably 22 degrees or 33 degrees. As bestshown in FIG. 15B, the plane of the dorsal surface 1524 of the flapretractor portion 1528 may be parallel or substantially parallel to thelateral plane of the tool 1500. However, in particularly preferredembodiments the dorsal surface 1524 is angled ventrally in thetransverse direction 3 by about 0 degrees to 90 degrees, more preferablyfrom 0 to 30 degrees and more preferably still by about 15 degrees.

FIGS. 16A-16G illustrate another embodiment tool 1600, having anembodiment combined tongue and flap retractor 1620 coupled to the handleregion 1630 by way of a neck region 1650 that is S-shaped in thetransverse plane (defined by the longitudinal direction 1 and thetransverse direction 3, as shown in FIGS. 16B and 16G), and straight inthe lateral plane (defined by the longitudinal direction 1 and thelateral direction 2, as shown in FIGS. 16C and 16D). It will beappreciated, however, that lateral bends to the right or left are alsopossible. As best shown in FIG. 16B, the tongue retractor portion 1627is substantially flat and due to the S-shaped neck region 1650 is at anangle of about 10 degrees to 90 degrees, and preferably about 45 degreesrelative to the longitudinal length 1 of the handle portion 1630 (i.e.,to the lateral plane of the tool 1600). The distal end 1629 of thetongue retractor portion 1627 may have a lateral width 2 as discussed inprevious embodiment tongue retractors, and preferably about 27 mm, whilethe tongue retractor portion 1627 may have a length of from 10 mm to 50mm, and preferably about 30 mm. The flap retractor portion 1628 iscoupled to the dorsal surface 1621 of the tongue retractor portion 1627and extends beyond the distal end 1629 of the tongue retractor portion1627. The distal end 1602 of the flap retractor portion 1628 may have awidth in the lateral direction 2 of about 5 mm to 20 mm, more preferably10 mm to 15 mm, more preferably still about 13 mm, while the flapretractor portion 1628 may extend from the distal end 1629 of the tongueretractor portion 1627 by 1 mm to 15 mm, preferably from 2 mm to 10 mm,more preferably still about 6 mm. The top surface 1624 of the flapretractor portion 1628 may be substantially parallel to the top surface1621 of the tongue retractor portion 1627. In other embodiments the topsurface 1624 of the flap retractor portion 1628 may have a transverseangular displacement with respect to the lateral plane of the device by0 degrees to 90 degrees, more preferably from 5 degrees to 30 degrees,with about 15 degrees being particularly preferred. The flap retractorportion 1628 may directly extend from a most distal edge 1629 of thetongue retractor portion 1627, or may instead extend out from a topsurface 1621 of the tongue retractor portion 1627.

FIGS. 17A-17F illustrate another embodiment tool 1700, having a combinedtongue and flap retractor 1720 similar to the embodiment tongue and flapretractor 1620, which is coupled to the handle region 1730 by way of aneck region 1750 that is S-shaped in the transverse plane (defined bythe longitudinal direction 1 and the transverse direction 3, as shown inFIG. 17B), and C-shaped in the lateral plane (defined by thelongitudinal direction 1 and the lateral direction 2, as shown in FIGS.17C and 17D). The lateral angular displacement of the combined tongueand flap retractor 1520 may be, for example, about 22 or 33 degrees,either to the right or to the left. The plane of the dorsal surface 1724of the flap retractor portion 1728 may be angled ventrally in thetransverse direction 3 with respect to the lateral plane of the tool1700 by about 5 to 30 degrees, and more preferably by about 15 degrees.

FIGS. 18A-18G illustrate another embodiment tool 1800, having a combinedtongue and flap retractor 1820 similar to the embodiment tool 1600, butfor which the tongue retractor portion has an extended width, and mayhave a most distal width 1829 along lateral direction 2, for example,about 26 mm to 35 mm, preferably about 32 mm. The width of flapretractor portion 1828 preferably has a width of about 5 mm to 20 mm,more preferably 10 mm to 15 mm, more preferably still about 15 mm. Theworking element 1820 is coupled to the handle region 1830 by way of aneck region 1850 that is S-shaped in the transverse plane (defined bythe longitudinal direction 1 and the transverse direction 3, as shown inFIGS. 18B and 18G), and straight in the lateral plane (defined by thelongitudinal direction 1 and the lateral direction 2, as shown in FIGS.18C and 18D). The plane of the dorsal surface 1824 of the flap retractorportion 1828 may be angled ventrally in the transverse direction 3 withrespect to the lateral plane of the tool 1800 by about 5 to 30 degrees,more preferably by about 15 degrees.

FIGS. 19A-19G illustrate another embodiment tool 1900 that issubstantially similar to the embodiment tool 1600. However, the tongueretractor 1920 that is substantially similar to the embodiment tongueand flap retractor 1620 does not include a flap retractor portion.Hence, the embodiment tool 1900 provides only the functionality of atongue retractor, in addition to the other functionality provided byfirst operational unit 1910.

FIGS. 20A-20F illustrate another embodiment tool 2000, having a tongueretractor 2020 similar to the embodiment tongue retractor 1920, which iscoupled to the handle region 2030 by way of a neck region 2050 that isS-shaped in the transverse plane (defined by the longitudinal direction1 and the transverse direction 3, as shown in FIG. 20B), and C-shaped inthe lateral plane (defined by the longitudinal direction 1 and thelateral direction 2, as shown in FIGS. 20C and 20D). The lateral angulardisplacement of the tongue retractor 2020 may be, for example, about 22or 33 degrees, which may be in either the right or left directiondepending upon the working area in the mandible.

FIGS. 21A-21F illustrate another embodiment tool 2100, having a tongueretractor 2120 similar to the embodiment tongue retractor 700. However,as best shown in FIG. 21E, the most distal edge 2129 is not level with,or parallel to, the lateral plane of the device 2100 defined by thelongitudinal direction 1 and the lateral direction 2. The lateral planeis shown in FIG. 21E as dotted line 2101. An inclination angle 2103exists between the inferior border of the device 2120 and the lateralplane 2101, and as a result a first lateral edge 2121 of the tongueretractor 2120 is longer than its opposing second lateral edge 2122. Theinclination angle 2103 is preferably from 5 degrees to 30 degrees, morepreferably still from 8 degrees to 20 degrees, with 8 degrees and 10degrees being particularly preferred. It will be appreciated thatproviding an inclination angle to the most distal edge of the secondoperational unit, such as tongue retractors and flap retractors, orcombinations thereof, may be implemented in all of the embodimentsdiscussed herein. The tool 2100 provides yet another way to negotiatethe anatomy of the mouth where one side is naturally lower as theDentist moves in the posterior direction within the mouth, providingimproved tongue retraction capabilities. Hence, it will be understoodthat the first lateral edge 2121 and the second lateral edge 2122 may beon left or right sides based upon the working region in mouth.

FIGS. 22A-22F illustrate another embodiment tool 2200, having a combinedtongue and flap retractor 2220 similar to the earlier embodiment tongueand flap retractor 1500. However, the working end of the tool 2200 isrotated to obtain an effect similar to earlier embodiment tools. Withreference to FIG. 22A, the working end of the tool 2200 may have a neckregion that is, for example, S-shaped in the transverse plane andL-shaped in the lateral plane, provided by a first bend 2222 and a moredistal second bend 2224. The lateral angular displacement may be, forexample, from 5 degrees to 90 degrees, more preferably from 15 degreesto 45 degrees, more preferably still 22 degrees or 33 degrees, andprovided completely by the second bend 2224. The ventral, transverseangular displacement may be, for example, from 0 to 90 degrees,preferably from 20 to 60 degrees, and more preferably about 33 or 45degrees in total as provided by both bends 2222, 2224. More generally,the various angular extents of these bends 2222, 2224 may be as in anyof the embodiments described herein, and may be exclusively within thelateral planes and the transverse planes. It will be appreciated,however, that an L-shaped or C-shaped bend in the lateral plane is notrequired to provide rotational offsets as discussed herein; that is, theinstruments may also be straight along the longitudinal direction 1,while also having a rotational offset of the working end. Further, itwill be appreciated that such rotations of the working end may beapplied to any tool discussed herein. These bends 2222, 2224 may defineaxes; for example, a first axis 2226 may be defined as running along aline connecting the first bend 2222 to the second bend 2224, while asecond axis 2228 may be defined as running along a line connecting thesecond bend 2224 to the midline of the working end of the tool 2200. Inaddition to spatial displacements provided by these bends 2222, 2224,the working end 2220 may also undergo rotational displacements, and inparticular rotational displacements along the second axis 2228 thatdirectly couples to the working end 2220 of the tool 2200. For example,the working end may be rotated by 5 degrees to 90 degrees, morepreferably from 20 degrees to 45 degrees, more preferably still by 25degrees or 35 degrees, around the second axis 2228. Hence, therotational orientation of the working end 2220 of the tool 2200 (whichmay be defined by the longitudinal and lateral extents of the workingend 2220) may be offset from that of the handle and neck regions, and inparticular may be offset from (i.e., form an angle with respect to) thelateral plane. This rotation of the working end (i.e., tongue and flapretractor 2220) of the tool 2200 may be anywhere along the axes 2228,2226; in a preferred embodiment the rotation is imparted at bend 2224.Such rotational offsets of the working end of the tool 2200, or anyother embodiment retractor discussed herein, provides the heretoforeunappreciated benefit of allowing greater ease of access to the targettissue area, and thus reduces strain upon the Dentist. In particular,such rotational offsets may help to better align the working end of thetool with the target anatomy within the patient's mouth, and thusrequire less readjusting and manipulating by the Dentist to achieve thedesired objective. Rotational offsets of from 5 to 45 degrees may beparticularly beneficial in this regard.

FIGS. 23A-23F illustrate another embodiment tool 2700, a firstembodiment multi-purpose tool 2700 that combines tongue and flapretraction with a suction device. Preferably the device 2700 isintegrally formed from any suitable material, such as plastic, and isdisposable. The multi-purpose tool 2700 includes a hollow, tubularportion 2704 that terminates in a distal end 2702 with a combined tongueand flap retractor 2720. The tubular section 2704 may have any suitablecross-sectional shape, such as rectangular, elliptical, hexagonal,octagonal or, as shown in FIGS. 23A-23F, substantially round; thiscross-sectional shape may change from the proximal end 2701 to thedistal end 2702. The proximal end 2701 of the tubular section 2704 ispreferably round to accept a standard vacuum-providing hose and includesa stop ring 2705. A neck region 2750 of the tubular section 2704connects the distal end 2702, and in particular the combined tongue andflap retractor 2720, to a handle region 2730. As shown in FIG. 23C, theneck region 2750 may be S-shaped in the transverse plane (defined by thelongitudinal direction 1 and the transverse direction 3), and straightin the lateral plane (defined by the longitudinal direction and thetransverse direction 2).

The combined tongue and flap retractor 2720 may include a tongueretractor portion 2727 and a flap retractor portion 2728 as previouslydescribed in relation to other embodiment devices. For example, thetongue retractor portion 2727 may have dimensions that are similar toother embodiment tongue retractors disclosed herein, such as the tongueretractor portion 1627 discussed in relation to FIGS. 16A-16G. A flapretractor portion 2728, centrally aligned with the tongue retractorportion 2727, extends from the distal end 2729 of the tongue retractorportion 2727. The flap retractor portion 2728 may have dimensions asdisclosed herein with respect to other embodiment flap retractors andflap retractor portions. In the embodiment shown, for example, in FIG.23C, the flap retractor portion 2728 is co-planar with the tongueretractor portion 2727, but, as previously disclosed, the flap retractorportion 2728 may have a different angle with respect to the plane of thetongue retractor portion 2727.

A ventral surface 2722 of the tongue retractor portion 2727 is used todirectly contact the tongue of the patient. A distal end region oftubular section 2704 is wholly disposed on top of and coupled to thedorsal surface 2721 of the tongue retractor portion 2727, with theopening 2709 of the distal end 2702 terminating at the distal edge 2729of the tongue retractor portion 2727, and thus, in certain embodiments,proximally to the flap retractor 2728. The opening 2709 may be, forexample, from 5 mm to 15 mm, preferably about 12 mm wide, with theheight of the opening 2709 being from 5 to 15 mm, preferably about 10mm.

FIGS. 24A-24G illustrate a second embodiment multi-purpose tool 2800,having a combined tongue and flap retractor 2820 similar to the firstembodiment multi-purpose tool 2700 above but which is slightly curvedrather than flat, which is coupled to the handle region 2830 by way of aneck region 2850 that is S-shaped in the transverse plane (defined bythe longitudinal direction 1 and the transverse direction 3, as shown inFIG. 24C), but which is L-shaped in the lateral plane (defined by thelongitudinal direction 1 and the lateral direction 2, as shown in FIG.24B). This lateral displacement may be either to the right or to theleft based upon the working area in the mandible, and the lateralangular offset is preferably 22 degrees or 33 degrees from thelongitudinal axis.

FIGS. 25A-25F illustrate a third embodiment multi-purpose tool 2900 thatis similar to the first embodiment multi-purpose tool 2700 above.However, the tongue retractor portion may be wider in the lateraldirection, such as from about 26 mm to 35 mm, preferably about 32 mm.

FIGS. 26A-26G illustrate a fourth embodiment multi-purpose tool 3000,having a combined tongue and flap retractor 3020 similar to themulti-purpose tool 2800 above but with a norrower tongue retractorportion 3020, which is coupled to the handle region 3030 by way of aneck region 3050 that is S-shaped in the transverse plane (defined bythe longitudinal direction 1 and the transverse direction 3, as shown inFIG. 26C), and L-shaped in the lateral plane (defined by thelongitudinal direction 1 and the lateral direction 2, as shown in FIG.26B).

FIGS. 27A-27G illustrate a first embodiment combined tongue retractorwith suction tool 3100, which combines tongue retraction with a suctiondevice. Preferably the device 3100 is integrally formed from anysuitable material, such as plastic, and is disposable, as with the abovemulti-purpose devices. However, non-disposable devices are alsocontemplated, such as devices made from stainless steel or any othersuitable material. The tool 3100 includes a hollow, tubular portion 3104similar to the tubular portions discussed above. The neck region 3150may be S-shaped in the transverse plane (defined by the longitudinaldirection 1 and the transverse direction 3), C-shaped in the lateralplane (defined by the longitudinal direction 1 and the transversedirection 2), and connects the operational unit 3120 on the distal endto the handle region 3130. It will be appreciated, however, that thedevice could also be straight in the lateral plane. The operational unit3120 is a tongue retractor 3124 in combination with a suction opening3109. The tongue retractor 3124 may have a shape that is similar to thetongue retractor 400 discussed in relation to FIGS. 4A-4F, and thus hasan exaggerated concavity, with the majority (i.e., 50% or more) of thecurvature in the transverse direction 3 defining the cavity being withinthe last third or less of the longitudinal length of the retractor 3124.A lower lip 3110 of the distal end region of tubular section 3104 isdisposed on top of and coupled to the dorsal surface of the tongueretractor 3124, so that opening 3109 is disposed just above the regionin which the majority of the curvature occurs in the retractor3124—i.e., just above the most distal third of the retractor 3124 and sois substantially aligned with the most distal extents of the tongueretractor 3124.

FIGS. 28A-28G illustrate a second embodiment combined tongue retractorwith suction tool 3200, which is similar to the tool 3100 discussedabove, but which has a lateral bend in the neck region. Furthermore, inthe embodiment 3200, a most distal edge 3209 of distal opening 3202extends beyond the most distal edge 3221 of tongue retractor 3220. Theadditional distal extension of the suction tube 3204 may be provided,for example, by a lower lip or the like. A distance of extension 3206 ofthe distal edge 3209 of suction tube 3204 with respect to the distaledge 3221 of tongue retractor 3220 may be from 0 mm to 10 mm, preferablyabout 6 mm. By way of example, the tool 3200 illustrates an embodimenthaving a 2 mm distance of extension 3206, whereas the tool 3400 shown inFIG. 30 and discussed in more detail below illustrates an embodimenthaving a 6 mm distance of extension 3499. With specific reference toFIG. 28B, the lip or extension 3209 may serve as a flap retractor. Itwill be appreciated that this distance of extension 3209 may also bezero, as in the embodiment 3100 discussed above, or even negative.Similarly, it should be appreciated that in the embodiment 3100discussed above, the lower lip of the distal end region of tubularsection 3104 may extend beyond the most distal extents of the tongueretractor 3120, similar to the distance of extension 3206 present in thethis embodiment 3200.

FIGS. 29A-29F illustrate a third embodiment combined tongue retractorwith suction tool 3300. In the tool 3300, the tubular body 3304terminates at its distal end with an S-shaped region 3302, so that thedistal opening 3306 of the tubular body 3304 is offset in the transversedirection 3 from the handle portion 3330. Opening 3306 may have anysuitable dimensions, such as those set forth above for opening 2709.This transverse offset distance 3399 may be from 15 mm to 40 mm, morepreferably from 20 mm to 30 mm, more preferably still about 28 mm. Atongue retractor 3320, similar to the tongue retractor 620 discussed inreference to FIGS. 6A-6G, is superimposed over the distal S-shapedportion 3302 of suction tube 3304. However, it will be appreciated thatother types of tongue retractors as disclosed herein could also be usedfor this embodiment. A bottom 3309 of distal opening 3306 issubstantially aligned with (i.e., within 2 mm of) the distal bottom 3329of tongue retractor 3320. This bottom portion 3309 of opening 3306 mayextend from 0 mm to 10 mm, preferably about 2 mm, beyond the distalextents of tongue retractor 3320. Because of the S-shaped curvature 3302of the distal section of suction tube 3304, a region of the tube 3304just proximal to the distal opening 3306 lies completely under thedorsal side 3324 of the tongue retractor 3320. Hence, the suctionprovided by the tube 3304 actually comes out through the distal end ofthe tongue retractor 3320, coming from the ventral side 3322 of thetongue retractor 3320 to the dorsal side 3324 of the tongue retractor3320. This configuration permits the working end 3306 of the suctiontube 3304 to get closer to the target site. By way of example ofpossible alternative embodiments, a tool similar to the tool 3300 mayfurther include a lateral bend in the neck region, a rotational offsetof the working end, or both.

FIGS. 30A-30F illustrate a fourth embodiment combined tongue retractorwith suction tool 3400, which is similar to the tool 3300. However, inthe tool 3400, the bottom extension 3409 of the distal end opening 3406of suction tube 3404 has increased distal extents that can serve as aflap retractor. That is, the suction opening 3406 has a lower lip 3409that extends further beyond the tongue retractor 3420. The length 3499of this flap retractor 3409 from the top surface 3424 of the tongueretractor 3420 may be from 0 mm to 10 mm, more preferably about 6 mm.Lateral bends in the neck region, and rotational offsets of the workingend are also possible. Also, it will be appreciated that other tongueretractor designs as disclosed herein may also be employed.

FIGS. 31A-31F illustrate a fifth embodiment combined tongue retractorwith suction tool 3500, which is similar to the tool 3100. However, incontrast to the tool 3100, the suction opening 3509 is disposedproximally to the most distal extents of tongue retractor 3520, and sohas a proximal offset 3599 with respect to the most distal extents ofthe tongue retractor 3520. The proximal offset 3599 may be from 1 mm to30 mm, more preferably from 10 mm to 20 mm, more preferably still about11 mm. Such a design may be beneficial as occasionally suction is betterif the opening of the suction tube is slightly spaced from the actualworking area; for example, the tool 3500 may suction spray from a handpiece better.

Reference is drawn to FIGS. 32A-32C, which present various views of ahandle 3600 that may be utilized for the handle region of various of theabove-described embodiment tools. Handle 3600 is substantially straightand made from a contiguous piece of material, which is preferablystainless steel, although other materials may also be used, such asplastic. Each end 3602 of handle 3600 may connect to a correspondingoperational end and, as discussed in various of the embodiments above,and optional intervening neck region. These may be integrally formedwith handle 3600, or may be attached to handle 3600, such as with athreaded connection or the like.

The exterior surface of handle 3600 comprises a plurality of surfacefeatures 3610 sequentially arrayed along a longitudinal length 3601 ofhandle 3600, which are separated from each other by correspondingdividers 3612. Preferably, each surface feature 3610 has a substantiallyidentical length along longitudinal direction 3601 as every othersurface feature 3610. Similarly, each divider 3612 has a substantiallyidentical length along longitudinal direction 3601 as every otherdivider 3612. In this manner, the sequential array of surface features3610 and corresponding dividers 3612 provides a visual cue of distancefrom an end 3602 of handle 3600; that is, the dividers 3612 functionmuch like tick marks of a ruler, indicating distance from acorresponding end 3602 of handle 3600.

Each surface feature 3610 comprises knurling, which extends around theentire outer circumference of handle 3600 within the region of thatsurface feature 3610. This knurling provides a superior gripping surfacefor the Dentist. Each surface feature 3610 preferably has a length alonglongitudinal direction 3601 from about 3 mm to about 15 mm, morepreferably from 3 mm to 10 mm, and more preferably still about 4 mm to 6mm, or about 5 mm.

Each divider 3612 completely encircles handle 3600, and is preferablyformed as a depression or recess in the outer surface of handle 3600,having a bottom surface that lies below the top surface of the knurlingof the adjacent surface features 3610. This recess provides a convenienttactile reference for the Dentist when gripping handle 3600, and alsoserves to increase the gripping characteristics of handle 3600. Toenhance the visual distinction between surface features 3610 anddividers 3612, the bottom surfaces of dividers 3612 may be smooth orpolished, which visually contrasts with the relatively matte knurling ofsurface features 3610. Each divider 3612 preferably has a width alonglongitudinal direction 3601 of 0.3 mm to 2 mm, more preferably from 0.5mm to 1 mm, more preferably still about 0.7 or 0.8 mm. Each divider 3612preferably has a depth (which may be measured from the top or exteriorsurface of the adjacent surface feature 3610 knurling) of about 0.3 to 2mm, more preferably about 0.3 to 1 mm, more preferably still about 0.5to 0.7 mm.

The surface features 3610 and dividers 3612 provided by handle 3600 notonly improve the grip of a Dentist upon handle 3600, but also provideboth tactile and visual cues of distance from the working end of a toolthat embodies handle 3600, which improves ease-of-use of such a tool.

Those skilled in the art will recognize that the present invention hasmany applications, may be implemented in various manners and, as such isnot to be limited by the foregoing embodiments and examples. Any numberof the features of the different embodiments described herein may becombined into a single embodiment, the locations of particular elementscan be altered and alternate embodiments having fewer than or more thanall of the features herein described are possible. For example, the neckregion of a tool may include one or more of an S-shaped bend, a lateralbend to provide a lateral displacement of the working end, and arotational displacement of the working end. The lateral displacement maybe to the left or right of the longitudinal axis of the handle, and therotational offset may be either clockwise or counter-clockwise.Functionality may also be, in whole or in part, distributed amongmultiple components, in manners now known or to become known.

It will be appreciated by those skilled in the art that changes could bemade to the embodiments described above without departing from the broadinventive concept thereof. It is understood, therefore, that thisinvention is not limited to the particular embodiments disclosed, but itis intended to cover modifications within the spirit and scope of thepresent invention. While there has been shown and described fundamentalfeatures of the invention as applied to being exemplary embodimentsthereof, it will be understood that omissions and substitutions andchanges in the form and details of the disclosed invention may be madeby those skilled in the art without departing from the spirit of theinvention. Moreover, the scope of the present invention coversconventionally known, future developed variations and modifications tothe components described herein as would be understood by those skilledin the art.

What is claimed is:
 1. A dental tool, comprising: an operational unit; aneck connected to a proximal end of the operational unit; and a handleconnected to a proximal end of the neck; wherein the neck comprises afirst portion connected to the handle and angled downward with respectto a longitudinal axis of the handle, and a second portion connected tothe first portion and the operational unit and angled upward withrespect to a longitudinal axis of the first portion, a distal end of thesecond portion downwardly offset from the longitudinal axis of thehandle, the second portion angled downward with respect to thelongitudinal axis of the handle.
 2. The dental tool of claim 1, whereinthe neck further comprises a lateral bend to laterally offset theoperational unit to the left or to right with respect to thelongitudinal axis of the handle.
 3. The dental tool of claim 1, furthercomprising a suction shaft positioned generally along a longitudinalextent of the operational unit.
 4. The dental tool of claim 1, whereinthe operational unit is a tongue retractor having a generally L-shapedcross-section and including a planar end that is substantiallyperpendicular to the longitudinal axis of the handle.
 5. The dental toolof claim 1, wherein the operational unit is a retractor having a topface substantially parallel to a bottom face, the top and bottom facesseparated from each other by a lateral sidewall providing a firstthickness, a distal end of the retractor having a lateral extent of 2.5to 10 times the first thickness.
 6. The dental tool of claim 5, whereinthe first thickness is from 2 mm to 4 mm, and the lateral extent is from10 mm to 20 mm.
 7. The dental tool of claim 1, wherein the operationalunit is a substantially flat tongue retractor angled from 10 degrees to90 degrees with respect to the longitudinal axis of the handle, a distalend of the tongue retractor having a width of from 10 mm to 40 mm, and alength of the tongue retractor being from 10 mm to 50 mm.
 8. A dentaltool, comprising: a handle; a neck connected to the handle, the neckcomprising: a first portion connected to a distal end of the handle andextending distally along a direction parallel to a plane of the handle;a second portion angled downward with respect to a longitudinal axis ofthe first portion, a proximal end of the second portion connected to adistal end of the first portion; and a third portion angled upward withrespect to a longitudinal axis of the second portion and angled downwardwith respect to a longitudinal axis of the handle, a proximal end of thethird portion connected to a distal end of the second portion, thedistal end of the third portion downwardly offset from the longitudinalaxis of the handle; and an operational unit connected to a distal end ofthe third portion of the neck.
 9. The dental tool of claim 8, whereinthe neck further comprises a lateral bend to laterally offset theoperational unit to the left or to right with respect to thelongitudinal axis of the handle.
 10. The dental tool of claim 8, furthercomprising a suction shaft positioned generally along longitudinalextents of the dental tool.
 11. The dental tool of claim 8, wherein theoperational unit is a tongue retractor having a generally L-shapedcross-section and including a planar end that is substantiallyperpendicular to the longitudinal axis of the first portion.
 12. Thedental tool of claim 8, wherein the operational unit is a retractorhaving a top face substantially parallel to a bottom face, the top andbottom faces separated from each other by a lateral sidewall providing afirst thickness, a distal end of the retractor having a lateral extentof 2.5 to 10 times the first thickness.
 13. The dental tool of claim 12,wherein the first thickness is from 2 mm to 4 mm, and the lateral extentis from 10 mm to 20 mm.
 14. The dental tool of claim 8, wherein theoperational unit is a substantially flat tongue retractor angled from 10degrees to 90 degrees with respect to the longitudinal axis of the firstportion, a distal end of the tongue retractor having a width of from 10mm to 40 mm, and a length of the tongue retractor being from 10 mm to 50mm.